﻿// ----------------------------------------------------------------------------------------------
// Copyright (c) Mårten Rånge.
// ----------------------------------------------------------------------------------------------
// This source code is subject to terms and conditions of the Microsoft Public License. A 
// copy of the license can be found in the License.html file at the root of this distribution. 
// If you cannot locate the  Microsoft Public License, please send an email to 
// dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound 
//  by the terms of the Microsoft Public License.
// ----------------------------------------------------------------------------------------------
// You must not remove this notice, or any other, from this software.
// ----------------------------------------------------------------------------------------------
using System.Windows;
using System.Windows.Navigation;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;

namespace WindowsPhoneJson
{
   public partial class App
   {
      /// <summary>
      /// Provides easy access to the root frame of the Phone Application.
      /// </summary>
      /// <returns>The root frame of the Phone Application.</returns>
      public PhoneApplicationFrame RootFrame { get; private set; }

      /// <summary>
      /// Constructor for the Application object.
      /// </summary>
      public App ()
      {
         // Global handler for uncaught exceptions. 
         UnhandledException += Application_UnhandledException;

         // Show graphics profiling information while debugging.
         if (System.Diagnostics.Debugger.IsAttached)
         {
            // Display the current frame rate counters.
            Application.Current.Host.Settings.EnableFrameRateCounter = true;

            // Show the areas of the app that are being redrawn in each frame.
            //Application.Current.Host.Settings.EnableRedrawRegions = true;

            // Enable non-production analysis visualization mode, 
            // which shows areas of a page that are being GPU accelerated with a colored overlay.
            //Application.Current.Host.Settings.EnableCacheVisualization = true;
         }

         // Standard Silverlight initialization
         InitializeComponent ();

         // Phone-specific initialization
         InitializePhoneApplication ();
      }

      // Code to execute when the application is launching (eg, from Start)
      // This code will not execute when the application is reactivated
      void Application_Launching (object sender, LaunchingEventArgs e)
      {
      }

      // Code to execute when the application is activated (brought to foreground)
      // This code will not execute when the application is first launched
      void Application_Activated (object sender, ActivatedEventArgs e)
      {
      }

      // Code to execute when the application is deactivated (sent to background)
      // This code will not execute when the application is closing
      void Application_Deactivated (object sender, DeactivatedEventArgs e)
      {
      }

      // Code to execute when the application is closing (eg, user hit Back)
      // This code will not execute when the application is deactivated
      void Application_Closing (object sender, ClosingEventArgs e)
      {
      }

      // Code to execute if a navigation fails
      void RootFrame_NavigationFailed (object sender, NavigationFailedEventArgs e)
      {
         if (System.Diagnostics.Debugger.IsAttached)
         {
            // A navigation has failed; break into the debugger
            System.Diagnostics.Debugger.Break ();
         }
      }

      // Code to execute on Unhandled Exceptions
      void Application_UnhandledException (object sender, ApplicationUnhandledExceptionEventArgs e)
      {
         if (System.Diagnostics.Debugger.IsAttached)
         {
            // An unhandled exception has occurred; break into the debugger
            System.Diagnostics.Debugger.Break ();
         }
      }

      #region Phone application initialization

      // Avoid double-initialization
      bool phoneApplicationInitialized = false;

      // Do not add any additional code to this method
      void InitializePhoneApplication ()
      {
         if (phoneApplicationInitialized)
            return;

         // Create the frame but don't set it as RootVisual yet; this allows the splash
         // screen to remain active until the application is ready to render.
         RootFrame = new PhoneApplicationFrame ();
         RootFrame.Navigated += CompleteInitializePhoneApplication;

         // Handle navigation failures
         RootFrame.NavigationFailed += RootFrame_NavigationFailed;

         // Ensure we don't initialize again
         phoneApplicationInitialized = true;
      }

      // Do not add any additional code to this method
      void CompleteInitializePhoneApplication (object sender, NavigationEventArgs e)
      {
         // Set the root visual to allow the application to render
         if (RootVisual != RootFrame)
            RootVisual = RootFrame;

         // Remove this handler since it is no longer needed
         RootFrame.Navigated -= CompleteInitializePhoneApplication;
      }

      #endregion
   }
}